Buick 1993 LeSabre Owner's Manual page 47

Securing a Child Restraint in a Rear
Outside Position
See if the shoulder belt would go in front of the
child's face or neck. If so, put it behind the child
restraint.
You'll be using the lap-shoulder belt. See the earlier
section about the top strap if the child restraint has one.
1. Put the restraint on the seat. Follow the instructions
for the child restraint.
2. Secure the child in the child restraint as the
instructions say.
3. Pull out the vehicle's safety belt and run the lap part
through or around the restraint. The child restraint
instructions will show you how.
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